Browsing by Subject "Aquatic ecosystem"
Now showing items 1-20 of 22
-
Abundance, transportation, and preservation of Mysis diluviana eDNA in freshwater ecosystems
(2021)Environmental DNA (eDNA) has proven to be a valuable tool in detecting rare or invasive species, particularly within the Great Lakes and surrounding aquatic ecosystems. Recent work has shown that sedimentary eDNA (sedDNA) ... -
Are the fish safe to eat? An examination of Lake Nipigon fish consumption guidelines through the perspective of Biinjitiwaabik Zaaging Anishinaabek
(2024)Mercury (Hg) is a contaminant of concern when consuming fish from freshwater lakes. It is known to persist in high concentrations in piscivorous fishes such as Walleye which are commonly consumed by people. The people ... -
The association between watershed characteristics and mercury concentrations in fish of Northern Ontario lakes
(2014-01-22)Many landscape, limnological, and ecological factors synergistically affect the mercury cycle and subsequently influence total mercury (THg) concentrations in fish. In Chapter 1, the associations between watershed and lake ... -
A brief review on restoration projects on Lake Superior coastal wetlands in Ontario, Canada
(2020)In recent years, human beings have done much damage to the lakes and wetlands, resulting in some irreversible effects. It is, therefore, necessary to restore and protect the remaining wetlands. The most representative ... -
Changes in yellow perch diets associated with nanosilver exposure in freshwater lakes
(2017)Freshwater lake experiments on the effects of nanosilver were completed at the Experimental Lakes Area in northwestern Ontario. Since nanosilver has antibacterial properties it is expected to have negative effects on ... -
The effect of cottage development on aquatic macroinvertebrate communities and water quality in central Ontario lakes
(2023)In Canada, over 3 million freshwater lakes provide a wide range of ecological, financial, aesthetic, and public health services for their citizens, communities, and tourists. This is especially true for regions like ... -
The effects of climate change on the growth and spawning phenology of fishes in aquatic boreal environments
(2022)Global climate change is occurring and observed warming patterns have had significant impacts on aquatic environments as trends in water temperature are closely related to trends in air temperature. In ectothermic organisms ... -
Effects of macrophyte cutting on a whole lake ecosystem
(2023)Macrophytes are of significant importance to aquatic ecosystems, generating primary production in nearshore environments and providing physical structure and habitat for organisms in the littoral zone of lakes. Macrophyte ... -
Evaluating the utility of a point of care device to assess physiological differences among wild boreal fishes
(2022)With the increasing risk of anthropogenic impacts in boreal ecosystems there is a need for tools to rapidly assess impacts on organisms and properly inform resource managers. Though well-researched, the i-STAT a portable ... -
How does aquatic invertebrate community structure and abundance relate to brook trout (Salvelinus fontinalis) habitat quality?
(2019)Sixty-seven streams located south-west of Lake Nipigon, Ontario, were sampled for brook trout and macroinvertebrate orders. Sixteen orders were used to determine if their community structure significantly changed in different ... -
Impacts of Mysis diluviana extirpation on a whole lake ecosystem
(2020)Understanding species interactions is critical to predicting the ecosystem-level impacts of anthropogenically-caused species extirpations. In particular, the loss of keystone species - those that have exceptionally large ... -
The invasion of dreissenid mussels into Lake Simcoe and their effect on benthic invertebrates
(2021)The establishment of dreissenid mussels (zebra mussel, Dreissena polymorpha and the quagga mussel Dreissena rostriformis bugensis) in Lake Simcoe in 1997 and 2008, respectively, in Lake Simcoe has drastically altered ... -
Invasive spiny water flea (Bythotrephes cederströmii) and their impacts on young-of-year walleye (Sander vitreus) growth
(2022)Invasive species are a major threat to aquatic ecosystems, costing an estimated $3.6 billion in impacts across Ontario. In particular, the predatory cladoceran Bythotrephes cederströmii (Bythotrephes hereafter) has had ... -
Kama Creek culvert restoration: an assessment of long-term remediation success
(2018)The purpose of studying the long term remediation success of Kama Creek, Nipigon Bay, Lake Superior, was to follow up on past remediation research with special attention to emerging concerns and the importance of continued ... -
Patterns of mercury accumulation in northern Ontario walleye and relationship with watershed characteristics
(2018)Mercury is a well known toxic contaminate that poses health risks to humans and wildlife. In Ontario 85% of consumption restrictions of fish from inland lakes is due to mercury contamination. The purpose of this study was ... -
A physical and spatial assessment of remediated submerged habitats within the Thunder Bay area of concern
(2020)The designation of Thunder Bay’s Harbour as an Area of Concern (AOC) by the International Joint Commission prompted the need for Remedial Action Plans to improve historically significant habitats (RAP, 1991; RAP 2004). In ... -
Physical habitat associations of fish species in the Kivalliq region of Nunavut, Canada
(2020)The Canadian arctic and subarctic (areas north of 60° latitude) support distinct aquatic environments governed by the unique geomorphology and climate of the region. Historically, fish and fish habitat impacted by ... -
Predicting brook trout distributions using the aquatic ecosystem classification for Ontario’s rivers and streams
(2018)Brook trout are a highly valued aquatic species that are sensitive to changes in their environment. Studies show that optimal brook trout habitats have declined due to anthropogenic effects like forest fragmentation, ... -
The response of riffles and pools to changing water contaminants in Sixteen-mile Creek, Halton, Ontario
(2020)Increasing water contaminants has been a growing problem in Southern Ontario due to rapid urbanization, agricultural runoff and pollution. Determining how riffles and pools respond to changing contaminants is crucial to ... -
Salmonid thermal habitats in Lake Superior tributaries
(2020)For some potamodromous salmonid species, such as the Brook Trout, streams are a critical spawning habitat but also habitat for juveniles and stream residents to grow. Salmonids are coldwater fishes and cooler stream water ...